| Experiments on accumulation and chemical forms of Cd, Pb, Zn and Ni in arid oasis soils |
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| DOI：10.7606/j.issn.1000-7601.2010.05.20 |
| Key Words: oasis soils heavy metals celery absorption and accumulation speciation |
| Author Name | Affiliation | | LIAO Qin | Key Laboratory of Western China's Environment(Ministry of Education), College of Resources and Environment Sciences, Lanzhou University, Lanzhou, Gansu 730000, China | | WANG Shengli | Key Laboratory of Western China's Environment(Ministry of Education), College of Resources and Environment Sciences, Lanzhou University, Lanzhou, Gansu 730000, China | | NAN Zhongren | Key Laboratory of Western China's Environment(Ministry of Education), College of Resources and Environment Sciences, Lanzhou University, Lanzhou, Gansu 730000, China | | WU Wenfei | Key Laboratory of Western China's Environment(Ministry of Education), College of Resources and Environment Sciences, Lanzhou University, Lanzhou, Gansu 730000, China | | ZHOU Ting | Key Laboratory of Western China's Environment(Ministry of Education), College of Resources and Environment Sciences, Lanzhou University, Lanzhou, Gansu 730000, China | | JIN Wangqiang | Key Laboratory of Western China's Environment(Ministry of Education), College of Resources and Environment Sciences, Lanzhou University, Lanzhou, Gansu 730000, China | | ZHAO Cuicui | Key Laboratory of Western China's Environment(Ministry of Education), College of Resources and Environment Sciences, Lanzhou University, Lanzhou, Gansu 730000, China | | LIU Jiao | Key Laboratory of Western China's Environment(Ministry of Education), College of Resources and Environment Sciences, Lanzhou University, Lanzhou, Gansu 730000, China |
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| Abstract: |
| Pot experiment was conducted to study the absorption and accumulation characters of Cd, Pb, Zn and Ni on the growth of celery and the chemical forms of selected
heavy metals in arid oasis soils. The results showed that the accumulation rate order of heavy metals from soil to the celery was Cd＞Zn＞Ni＞Pb, and the conce
ntration of heavy metals in the root was higher than that in leaves. The chemical form contents of metal Pb, Zn and Ni mainly existed in residual fraction in untreated soils, while Cd mainly existed in Fe-Mn oxides bound form. With the increase of exotic heavy metals, the existence of Cd mainly was in the forms of carbonate, carbonate forms and Fe-Mn oxides bound forms to element Pb, and Fe-Mn oxides bound forms to metal Zn and Ni. According to the results of regression analysis, it was found that EX-Cd made significant contribution to the accumulation of Cd in the leaves of celery, EX-Pb and EX-Zn to the accumulation of Pb and Zn in both tissues, and FMO-Ni to the accumulation of Ni in the root of celery. |
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